The Komatsu 3EA2131140 gear is a genuine OEM component designed for various Komatsu mini excavators. This essential part, also known as a pinion, ensures proper power transmission within the machine's system, maintaining optimal performance and reliability. It is compatible with models including PC20MR-2, PC20MR-3, PC27MR-2, PC27MR-3, PC30MR-2, PC30MR-3, PC35MR-2, and PC35MR-3. Manufactured to Komatsu's stringent quality standards, it provides a precise fit and long-lasting durability for demanding operational conditions, weighing approximately 0.12 kg.